https://techcrunch.com/2019/01/16/alexa-gets-a-professional-newscaster-voice-for-reading-the-days-news/

Amazon already gave Alexa the ability to whisper, and now it’s rolling out another way to change the assistant’s speaking style – it’s giving Alexa a “newscaster” voice. Starting today, when U.S. customers ask Alexa “what’s the latest?” to hear the day’s news, Alexa will respond using a voice that’s similar to how a professional newscaster delivers news.

The voice knows which words should be emphasized for a more realistic delivery of the news, explains Amazon.